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In this paper, the production process $e^- e^+ \rightarrow A H$ is analyzedin the context of the type IV 2HDM and the question of observability of aneutral CP-even Higgs boson $H$ at a linear collider operating at $\sqrt{s}=1$TeV is addressed. The CP-odd Higgs is assumed to experience a gauge-Higgs decayas $A\rightarrow ZH$ with hadronic decay of $Z$ boson as the signature ofsignal events. The production chain is thus $e^+e^- \rightarrow AH \rightarrowZHH \rightarrow jj\ell\ell\ell\ell$ where $\ell$ is a $\tau$ or $\mu$. Fourbenchmark points with different mass hypotheses are assumed for the analysis.The Higgs mass $m_H$ is assumed to vary within the range 150-300 GeV inincrements of 50 GeV. The anti-$k_t$ algorithm is used to perform the jetreconstruction. Results indicate that the neutral CP-even Higgs $H$ isobservable through this production mechanism using the di-muon invariant massdistribution with possibility of mass measurement. The corresponding signalsignificances exceed $5\sigma$ at integrated luminosity of 3000 $fb^{-1}$.

Search for heavy neutral CP-even Higgs within Type-IV 2HDM at a future linear collider